LCT type 1
Atlantean Landing Craft, Tank laid down 1932 (1931 design)
Displacement:
300 t light; 308 t standard; 314 t normal; 318 t full load
Dimensions: Length overall / water x beam x draught
134.24 ft / 125.00 ft x 34.00 ft x 4.10 ft (normal load)
40.92 m / 38.10 m x 10.36 m x 1.25 m
Armament:
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1931 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 1 lbs / 0 kg
Shells per gun, main battery: 2,500
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.79" / 20 mm 100.00 ft / 30.48 m 4.00 ft / 1.22 m
Ends: 0.39" / 10 mm 25.00 ft / 7.62 m 7.00 ft / 2.13 m
Upper: 0.39" / 10 mm 100.00 ft / 30.48 m 7.00 ft / 2.13 m
Main Belt covers 123 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm - -
- Conning tower: 1.00" / 25 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 403 shp / 300 Kw = 11.50 kts
Range 1,400nm at 7.00 kts
Bunker at max displacement = 11 tons
Complement:
36 - 48
Cost:
£0.053 million / $0.214 million
Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 29 tons, 9.3 %
- Belts: 28 tons, 8.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 12 tons, 3.8 %
Hull, fittings & equipment: 78 tons, 25.0 %
Fuel, ammunition & stores: 14 tons, 4.4 %
Miscellaneous weights: 180 tons, 57.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
480 lbs / 218 Kg = 1,960.2 x 0.8 " / 20 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 1.5 ft / 0.4 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.32
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.630
Length to Beam Ratio: 3.68 : 1
'Natural speed' for length: 11.18 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 53
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.00 ft / 4.88 m
- Forecastle (20 %): 7.00 ft / 2.13 m
- Mid (50 %): 7.00 ft / 2.13 m
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 7.72 ft / 2.35 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.2 %
- Above water (accommodation/working, high = better): 118.4 %
Waterplane Area: 3,196 Square feet or 297 Square metres
Displacement factor (Displacement / loading): 134 %
Structure weight / hull surface area: 20 lbs/sq ft or 99 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.62
- Longitudinal: 1.86
- Overall: 0.69
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily